Device on an automatic pirn winder for depositing on a pirn skewer board the pirns ejected by an automatic pirn winder



ly 7, 1954 w. SCHWEITER ET AL 2,684,798

DEVICE ON AN AUTOMATIC PIRN WINDER FDR DEPOSITING ON A PIRN SKEWER BOARD THE PIRNS EJECTED BY AN AUTOMATIC PIRN WINDER Filed July 10, 1951 4 Sheets-Sheet 1 INVENTORS. WALTER SCHWEITER 8 ATTOEA/f y 1954 w SCHWEITER ETAL 2 ,7

9 DEVICE ON AN AUTOMATIC PIRN WINDER FOR DEPOSITING ON A PIRN SKEWER BOARD THE PIRNS EJECTED BY AN AUTOMATIC PIRN WINDER 4 Sheets-Sheet 2 Filed July 10 12 51 July 27, 1954 w. SCHWEITER ET AL DEVICE ON AN AUTOMATIC PIRN WINDER FOR DEPOSITIN ON A PIRN SKEWER BOARD THE PIRNS EJECTED BY AN AUTOMATIC PIRN WINDER 4 Sheets-Sheet 3 Filed July 10, 1951 Patented July 27, 1954 DEVICE ON AN AUTOMATIC PIRN WINDER FOR DEPOSITING ON A PIRN SKEWER BOARD THE PIRNS EJECTED BY AN AUTO- MATIC PIRN WINDER Walter Schweiter and Karl Marx, Horgen, Switzerland, assignors to Schweiter Ltd., Horgen, Switzerland, a corporation of Switzerland Application July 10, 1951, Serial No. 235,924

Claims priority, application Switzerland July 22, 1950 6 Claims.

The present invention relates to a device on an automatic pirn winder for depositing on a pirn skewer board the bobbins ejected by an automatic pirn winder. With multiple-spindle winding machines, pirn skewer boards are used which have a number of pirn skewers or pegs on which the wound pirns are skewered so that, where different colours or kinds of yarn are wound simultaneously, said diiierent colours or kinds of yarn can be collected separately. The pirn skewer board is, in these machines, moved on by one skewer pitch at each pi n change. Now, it is of great importance, especially in weaving-mill practice, that the pirns which are wound with the thread of a large cross-wound bobbin (cheese) should be charged into the loom shuttle in the same order as that in which their winding is effected. In this way, with dyed yarns in particular, fluctuations in the colour of the thread of a cheese are rendered less conspicuous than where the pirns are indiscriminately introduced into the weft.

For this purpose it has been proposed to deposit the pirns in a box, in rotation, by mechanical means. Of the pirns contained in a box, however, only the topmost are visible, and these only from one side, with the result that faultilywound pirns are not detectable as such. In this respect, pirn skewer boards are more advantageous because they enable the pirns to be inspected.

A cross-wound bobbin (cheese) of the size in common use yields about 50 weft pirns when unwound. These weft pirns should now be skewered on a pirn skewer board in a definite order and be conveyed to the loom together with the skewer board, so that the pirns can be charged into the shuttle in the same sequence as that in which they were unwound from the cheese. But a pirn skewer board accommodating fifty pirns is too large to be guided in the known manner past the stationary pirn-ejection station in both directions, as the space required would be approximately twice the length and twice the width of the pirn skewer board.

The object of the invention is to enable a pirn skewer board for a large number of pirns, say approximately 50 pirns, to be charged with pirns at a pirn winder without the pirn skewer board having to be displaced laterally, so that the necessary space is no greater than that occupied by the pirn skewer board itself. The invention resides in the fact that both the pirn skewer board and the pirn ejection chute are so connected to the frame of the winding machine via 2 articulations that both units are pivotable about a stationary, imaginarypoint.

For this purpose, both the pirn ejection chute and the pirn skewer board are, in accordance with the invention, so secured to a winding frame by means of universal joints that angular movements can be imparted to both the pirn ejection chute and to the pirn skewer board, and thereby all the pegs or skewers on the pirn skewer board brought, in turn, into direct alignment with the centreline of the pirn ejection chute and the ejection chute surrenders a pirn to the peg axially aligned with said chute.

In the annexed drawing typical embodiments of the invention are illustrated. In the drawing:

Fig. 1 shows diagrammatically how a pirn skewer board arranged to pivot in two directions about a point, and a pirn ejection chute also pivoted in two directions about a point will serve the end sought;

Fig. 2 shows geometrically two universal joints of which the upper serves to pivot the pirn ejection chute and the lower to pivot the pirn skewer board;

Fig. 3 is a very diagrammatic perspective view of a mechanism having pivoting frame on which a pirn skewer board can be placed, and of the appurtenant, pivoting pirn ejection chute;

Fig. 4 shows in section a form of mouth for the chute, and its curvilinear movement from skewer to skewer;

Fig. 5 shows the mechanical gear of the embodiment here illustrated by which the pirn ejection chute is intermittently shifted from one row of pegs on the pirn skewer board to the adjacent row;

Fig. 6 shows the mechanical gear by which the pirn ejection chute is shifted along the row from one skewer to the next;

Fig. '7 is a view of the mechanical gear to Fig. 6 taken in the direction of the arrow in Fig. 6;

Fig. 8 shows diagrammatically the path described by the pirn ejection chute when charging the pirn skewer board;

Fig. 9 shows a portion of the drive mechanism of the device in conjunction with an automatic pirn-winder, viewed from the side;

Fig. 10 is a plan view of the gearing of the device;

Fig. 11 is a section through a portion of the mechanism of the gear box of Fig. 9;

Fig. 12 is a lateral overall View of the arrangement.

As indicated before, Fig. 1 illustrates the principle on which the pirns are directed to the skewers of the skewer board according to the present invention. ihe delivery device which passes the pirns to the skewers and board is represented in this Fig. 1 by a tube or chute L down which the pirns pass successively by gravity. At Sp a pirn is shown passing from the chute toward a skewer of the board. The delivery device, or at least its discharge portion from which the pirns pass to the respective skewers (the lower end of the chute L in Fig. 1) is so mounted that this discharge portion is movable substantially throughout a solid arc of a solid angle having its apex at a point B. The solid angle is indicated by the side lines C and D and the elliptical lines E and F outlining its base; the lines E and F also indicate the boundaries of the solid arc of Fig. 1. The skewer board H to which the pirns are to be delivered is located at the opposite side of the solid are E, F from the solid angle apex B, with its skewers or pins pointing toward this arc, and is so mounted that it can be rocked into various planes, each of which is parallel to, but generally at least is spaced somewhat from, a plane that is tangent to the solid are at some individual point on the are. In Fig. 1, some of the pins or skewers of the board H are indicated at S. Preferably the board is so disposed that it can be brought into a plane parallel to the plane which is tangent to the solid are E, F at the center point of the arc and with the center point A of the board substantially lying in a straight line drawn from the apex B to and through this center point of the arc (the position occupied by the board H in Fig. 1), and the board is rocked about this internal point A of it. I. e., this point on the board remains fixed in space as the board is rocked. This arrangement is not altogether essential however, as will become apparent. Speaking generally, the number of planes into which the skewer board. can be rocked corresponds to the number of skewers or pins on the boardpreferably the number of these planes equals the number of skewers or pins-and each plane is so chosen that when the board lies in the respective plane at least one of the skewers or pins lies substantially normal to the solid arc; i. e. lies substantially in a radius of the arc, or in a radius of the are extended. At S2 in Fig. 1 are represented two skewers standing in such normal or radial positions. Further, the skewer board H and the discharge portion of the pirn delivery device (for example, the lower end of a chute L), are so connected together that when the board. H is brought into any one of the planes which it can occupy, and thereby at least one skewer or pin is brought to a position substantially normal to the solid arc, the discharge portion of the delivery device is brought along the arc correspondingly to a position where it can deliver a pirn to that skewer.

It follows accordingly that by this invention a skewer board can be filled with pirns without the board moving sidewise as it were, and accordingly can be filled within space that is available for the board adjacent winders. Thus for example (and referring to Fig. 8 for example for a numbering of the skewers), the board can be rocked into a plane that places No. l skewer normal to the solid arc and correlatively the discharge portion of the pirn delivery device placed ad acent to this skewer. As soon as a pirn has been delivered to this skewer, the board can be rocked again into an adiacent plane where No. 2 skewer is normal to the arc, and along with this the discharge portion of the delivery device placed adjacent to the No. 2 skewer. When a pirn has been delivered to this No. 2 skewer, the operations can be repeated with respect to No. 3 skewer, and thereafter with respect to No. 4, and so on until the last skewer on the board has received a pirn. When this last has occurred, the filled board can be removed and replaced by an empty skewer board, and at about the same time the board carrier of the device can be rocked to place the No. 1 skewer of the empty board normal to the are and the discharge portion of the pirn delivery device moved to adjacent the new No. 1 skewer. The whole series of operations then can be started over again.

The required movements of the skewer board and the delivery portion of the pirn delivery device are such as to be readily accomplished mechanically. Thus the movement of the discharge portion of the pirn delivery device can be brought about easily by, for example, swinging the tube or chute L of Fig. i; also the required movements can be given to such guide members for the pirns as L, and to carriers for the skewer boards, by mounting them on universal joints. The principle of this is illustrated in Fig. 2. Fixed bearings 2 carry a member 3 rotatable or revolvable therein on what may be called axis 111. This member 3 in turn carries a hearing or bearings 5 and 6 in which a member '5 is rotatable or revolvable on what may be called axis 0:1, and which also, with the member 3, rotates or revolves about the point B of Fig. 2. The point B of this structure, at the intersection of x1 and g1, corresponds to point B of Fig. 1, and by mounting the tube or chute L on the member l, and operating 3 and independently but simultaneously in a manner that will be understood, the lower or delivery end of the chute or pirn guide L can be swept over a solid arc, e. g. the are E, F, and brought to any selected point on the are at will. Similarly fixed bearings Iii carry a member Hi, say, rotatable therein along what may be called axis 112, and in turn this member it carries bearings Ha in which a member is is, say, rotatable about what may be called axis $2. The member [5 may be the carrier of the skewer boards, on which they are placed successively. The intersection of axis :02 and axis 212, or the point where one passes above the other, corresponds to point A of Fig. 1. By turning the members l4 and 18 in their bearings independently but simultaneously in a manner that will be understood, each skewer board can be carried through the rocking movements described with reference to Fig. 1. By interconnecting members 3 and M, as by arms 3b and i9 and a link V! for example, so that they move simultaneously and through, say, equal angles, and by interconnecting memhers I and it, as by arms 80. and 2% and a link V 2 for example, so that these two members move simultaneously and through, say, equal angles, the discharge portion of the chute or guide L and the skewer board on the carrier 58 at any moment can be made to perform their operations in the relation, one to another, described with reference to Fig. 1. It will be understood of course that only one of the known forms of universal joints has been represented in Fig. 2, and that another of those forms can be substituted readily for the form shown.

Incidentally, in the above we have mentioned rocking the skewer boards into planes parallel to and spaced from planes that are tangent to the solid are through which the discharge portion of the pirn delivery device is moved. This distinction between the planes in which the skewer boards may lie and the planes which are usually tangent to the solid arc, is due to the fact that probably, it will be necessary to space the skewer boards from the solid are somewhat in order that the discharge portion of the pirn delivery device may have room to move about without interference from the boards or the skewers on the boards. In so far as, for example, departures of the discharge portion of the pirn delivery device form an exact solid arc, or the form of this discharge portion itself, etc., may make spacing of the boards from the solid are unnecessary, planes of the boards and adjacent tangent planes may approach each other of course until, conceivably, some or all the planes of a board may actually be tangent planes. It is to be understood accordingly that the claims hereafter include situations where planes of sl-zewer boards are themselves tangent to the solid arc.

Fig. 3 illustrates also rather diagrammatically one of the possible mechanical embodiments of the arrangement represented in Fig. 2, and one that is well adapted for the present purpose. Reference characters like those of Fig. 3 are employed in Fig. 4.

Fig. 3 shows the two universal joints in perspective. The axis m is formed by the journals I, which are mounted in stationary bearings 2. The journals l are secured to the stirrup member 3 in which is rigidly mounted a rod 4 which embodies the axis :121. Rotatably mounted on the rod 4 by means of bearings 5 and 5 is a bracket 1 having an arm 8 to which the pirn ejection chute L1 is secured. The bracket 1 is also provided with an arm 8a The stirrup member 3 also has an arm 3b with an eye 30. The lower universal joint consists of the plate M, which is provided with journals I5 pivotally mounted in stationary bearings I 6 secured to the machine, and of the frame is pivotally mounted on the journals I! of the plate 14. The journals embody the axis 112 and the journals I! form the axis 112. The arm I9 is attached to the plate 14 and the arm is rigidly attached to the frame I8. The lever 8a and the arm '20 are intercom nected by the connecting rod V2 through balland-socket joints and in the same way the arm I9 and the arm 3b are articulatingly interconnected by the connecting rod V1. If a pirn skewer board H is now placed on the frame I8, the frame l8 will be pivoted when the arm 8a and the arm 31) are pivoted, so that the pirn ejection chute L1 is enabled to come into axial alignment with each skewer or peg S of the board H.

Fig. 5, like Fig. shows the stirrup member 3 which is mounted in the bearings 2 in the direction of the axis yr by means of journals I. The bearings 2 are integral with the side walls 50 and 5!, Fig. 10, of the gearbox of the device. Rigidly mounted in the stirrup member 3 is the rod 4 which is supported in the eye 3a of the stirrup member 3. The rod 4 constitutes the axis $1.

The bracket 1 is rotatably secured to the rod 4- by means of the bearings 5 and 6, said bracket 1 having an arm 8 to which the pirn ejection chute L1 is screwed. On the non-rotating rod 4 is mounted the swivelling joint member 9 with the pivot pin It, to which the eye a of the twoarmed lever 25 is articulated. The lever 25 is rotatably mounted on the pivot 26, which is rigidly seated in the walls 50 and 5|, Fig. 10, and the other end 251) of said lever 25 is provided with a roller 21. The cam plate 29, which has ten follower tracks a-k arranged stepwise at varying distances from, and about, the shaft 28, is keyed to the shaft 28, which is journalled in the side walls and 5!, Fig. 10, of the gearbox. The lever 25 therefore pivots according to the differences in radius of the steps a to k. The movement of the lever 25 from step to step causes the rod 4 to pivot about the journals I, so that the ejection chute travels from row to row of skewers, viz., from a to k, and from is via L1 back to skewer l of row a, as shown by the diagram of travel, Fig. 8. During the course of one step of the stepped cam plate, the pirn ejection chute L1 remains at the same level. As, however,

the pirn ejection chute has a semicircular mouth,

Fig. 4, for guiding the pirn, it must execute a curvilinear motion L2, Fig. 4, in order not to foul the surrendered pirn. For this purpose the follower track of the cam plate 29 is provided with notches 29a, with the result that the ejection chute does not travel in a straight line from one skewer to the next, but describes the arc L2, Fig. 4, which takes it out of reach of the skewered pirn. The stirrup member 3 has an arm 3b to the end of which the draw-rod V1 is secured via a ball-and-socket joint 30, so that the intermittent movement of the pirn ejection chute L1 from a to k is at the same time transmitted to the plate i 4, Fig. 3, of the universal joint of the pirn skewer board.

To move the pirn ejection chute along each row of skewers, a second cam plate 32, likewise keyed to the shaft 28', Fig. 11, and therefore rotating at the same angular velocity as the cam plate 29, is provided. Said cam plate 32 is provided on its circumference with five curves 33 and five curves 34. The path of the curves 33 from I to 5 serves to steer the ejection chute L1 from skewer l to skewer 5, Fig. 8. From point 5 to point 6 the cam plate 29 produces the lateral travel for transferring the ejection chute L1 to row I) of skewers, Fig. 8, whereupon the path of the curves 34 from point 6; to point Iii guides the pirn ejection chute from skewer 6 to skewer I0.

- The curves 33 and 34 are likewise provided with notches 33a which serve to provide the curvilinear movement of the pirn ejection chute from skewer to skewer of the pirn skewer board. To generate this movement, the roller 35 travels along the curved tracks 33 and 34, said roller 35 being secured to the arm 35a of the two-armed lever 35. The lever 35 is pivotally mounted on the pivot 26 and the arm 36b is provided with a balland-socket joint 3! to which the connecting rod 38 is articulated. Cast on to the arm 8 of the bracket 1 is an arm 8a having a branch arm 8b, Fig. '7, to which the connecting rod 38 is secured through a ball-and-socket joint 39. The end of the arm 8a is provided with a universal joint :22 in which the connecting rod V2 is mounted. On rotation of the cam plate 32, therefore, the lever as pivots on the pivot pin 25 and transmits its movement via the connecting rod 38 to the arm 3a, which is connected to the ejection chute L1, with the result that the lateral pivotal movement from row to row of the ejection chute L1 is generated. The connecting rod V2, which is connected to the frame l8, Fig. 3, of the universal joint, which frame carries the pirn skewer board, transmits the lateral pivotal motion of the ejection chute L1 to said board.

Figs. 9, 10 and 11 show the operative members which encompass the rotation of the two cam plates 29 and 32. In the side walls 50, 5| (Figs. 10 and 11) of the gearbox the shaft 28 is journalled; Keyed to the shaft 28 by;means-ofvkey- 28a are the cam plate-29 and a ratchet wheel- 53-havingthe same number of teeth 53b tas-the rod is pivotingly attached, said draw-rod 51 being connected to the control lever 58 of the gearbox 8d of a-winding frame. Thelever 55 is. operated by the draw-rod 5? when a pirn is changed. Articulated to the eye 56a of the lever 5., is a pickingpawl 62 which engages in the gaps .530 ofthe ratchet wheel 53. Also secured pivotally,to the gearbox and arranged-to pivot on a :pivot pin roller 65 which engages in the gaps 530 of the ratchet wheel 53. At each pirn change, the lever 55 is moved bythe draw-rod 57, and one tootht'b of the ratchet wheel 53 is picked by the pawl 52. The roller 65 locks the ratchet wheel 53 in the new position. -On this rotary movement, the cam plates 2?; and 32 are at the same time each stepped round by one tooth, with the result that, as described, a motion of the pirn ejection chute from one skewer to the next andthe corresponding motion of the pirn skewer boardare accomplished. When all the skewers on the skewer board are occupied, the ratchet wheel 53 has performed a complete revolution and the feeler pawl 58, which is pivoted to the lever 12 provided with a-drop-weight 13, drops through the gap 69 in the ringlil. For this purpose the lever l2 is pivotaliy mounted-on the pivot pin 2%, and the rod 16 is pivoted to the arm 14 of lever 72 by means of the pivot pin '75. The rod TB has a looplca in which'thein." of the stop lever 2'8 01 the winding frame 89 engages. Thus, when the feeler pawl 68 drops, the winding frame 6|} is stopped by the rod 5%,so that the a new full pirn skewer board can be replaced .by an empty one. Since the ratchet wheel 53 turns,

when the winder is started up again, before the drop pawl 38 is lifted quite clear of the gap 69,

said pawl is pivotally attached to the lever 12.

and held in position by the spring 68a, so that fi l is a weighting stirrup t3 having a itcan yield and jump on to the ring 10 .as .soon

as it leaves the gap 39.

When the pirn skewer board has been changed,

the rod is pressed down and the automatic pirn winder started again with the control lever 51. Onthe next pirn change the ratchet wheel 53 .is again stepped round to the extent of one tooth by thepawl from cam step k to cam step a, so that the pirn ejection chute comes to rest in front of skewer I. Thereturn of the pirn ejection channel can also take place after the last pirn. has been skewered.

Fig. 12 is a complete lateral elevation of the device connected to the automatic winder on a reduced scale in lateral elevation. In order to steady the individual movements of the pirn skewer board, a fluid dashpot 83 is provided which is connected to one part of the universal joint.

52,.when the roller 21 dropsback We claim 2.

lea-device for depositing pirnsonto skewers of a skewer board comprising a carrier for the. skewer board, a pirn delivery device todel-iver pirns to the skewers of a board on said carrier, and at least one universal joint to rock saidcarrier to rock-a skewer board thereon into planes 2. A device for depositing pirns onto a pirn skewer board comprising a carrier for the skewerboard, .a pirn delivery device to deliver pirns to theskewers of a board on saidcarrier, and at.

least one universal joint. tomove thedelivery portion of said pirn delivery device substantially throughout a solid arc andcorrelativelyrock. said carrier to rock a board thereoninto planes substantially parallel to planes tangent to said.

solid are at points onthe are adjacent momentary positions of the delivery portion of the pirndelivery device.

3. Av device for depositing pirns. onto a pirn board having skewers, comprising .a carrier for the board, a chute to deliver pirnsto .the skewers of a board on said support, a universal joint pivoting the discharge .end of said chute to swing substantially throughout a solidarc of a solid angle, said carrier being disposed at the opposite side of said solid are from the apex of said solid angle, a universal joint to.rock said carrier to rock a skewer board on said carrier into planes parallel to place skewers of the boardsuostantially normal to. said solid are successively, and an intercom. nection connecting said universal joints for conjoint. operation to direct the discharge end of said chute to adjacent whichever skewer is substantially normal to said are at the moment.

4..The subject matter of claim 3, characterized by the fact that means are provided to direct the rocking of said carrier to carry a .pirn board.

thereon from each of its planes to an adjacent plane successively substantially throughout said solid arc.

5. The subject matter of claim 4, characterized by-the fact that the center about which said carrier rocks is located at substantially the center of the carrier, and the center about which said end-of the chute swings is located in a straight line which passes through said center or rocking of the carrier and the center of the solid are.

6. The combination of the subject matter of claim 3 with a pirn winder having a control'member which operates on each change of pirn at the winder, said chute being disposed to receive wound pirns from said winder and said control member being connected to'said universal joints to control the operation thereof.

Name Date Hamilton Mar. 27, 1951 Number planes tangent tosaid solid arc to 

